6. A triangle has vertices at D(0, 2), E(8, 6) and F(2, n). If the triangle is right-angled at D.
find the values) of n.
7. The equations of the sides of a triangle are given by y+x-11, y-x-1 and 3y-x-3.
Find
(a) The coordinates of the vertices of triangle
(b) The perimeter of the triangle
8. Find the acute angle between the equations y=2x-3 and y=x+4.
9. Find the equation of the line that makes an angle of 45 degrees with the line y=3x-2
and passes through the point (6,4).
10. The lines 3x+4y-19,x-y--3 and 6x+y-31 enclose a triangular region in the x-y
plane. Find:
(a) The coordinates of the vertices of the region
(b) The perimeter of the triangle formed
(e) The area of the triangle
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